I like the article and am a big proponent of simple architectures. But. The described use cases have homogenous workloads. Hence simple architecture. Extrapol

I like the article and am a big proponent of simple architectures. But. The described use cases have homogenous workloads. Hence simple architecture. Extrapolate the rest. And of course there are for sure cases of people increasing complexity for the sake of being needed. That's a topic for sociologists/psychologists to reason about, not for engineers.